High Redshift Galaxy Populations and their Descendants

Details High Redshift Galaxy Populations and their Descendants High Redshift Galaxy Populations and their Descendants

2008-09-25

arxiv.org/abs/0809.4259v2

Astronomy and Astrophysics

Astrophysics

16 pages, 17 figures, submitted to MNRAS

Scientific paper

We study model predictions for three high-redshift galaxy populations: Lyman break galaxies at z~3 (LBGs), optically selected star-forming galaxies at z~2 (BXs), and distant red galaxies at z~2 (DRGs).Our galaxy formation model simultaneously reproduces the abundances, redshift distributions and clustering of all three observed populations. The star formation rates (SFRs) of model LBGs and BXs are lower than those quoted for real samples, reflecting different initial mass functions and scatter in model dust properties. About 85% of model galaxies selected as DRGs are star-forming, with SFRs ranging up to 100 M_sun/yr. Model LBGs, BXs and DRGs together account for less than half of all star formation over the range 1.510^{11}M_sun are classified as LBGs or BXs at the relevant redshifts, while 65% are classified as DRGs. Almost all model LBGs and BXs are central galaxies, but about a quarter of DRGs are satellites. Half of all LBG descendants at z=2 would be identified as BX's, but very few as DRGs. Clustering increases with decreasing redshift for descendants of all three populations, becoming stronger than that of L^* galaxies by z=0, when many have become satellite galaxies. Their stellar mass growth is dominated by star formation until z~1 and thereafter by mergers. Most LBGs and DRGs end up as red ellipticals, while BXs have a more varied fate. 99% of local galaxies with M>10^{11.5}M_sun are predicted to have at least one LBG/BX/DRG progenitor, and over 70% above 10^{11}M_sun. (abbreviated)

Affiliated with

Also associated with

No associations

Rating

High Redshift Galaxy Populations and their Descendants does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with High Redshift Galaxy Populations and their Descendants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High Redshift Galaxy Populations and their Descendants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-181028